Hashi wo Kakero
In Hashiwokakero you are the king of the islands, and your job is to connect the islands according to their populations – small islands need only one bridge (it says 1 in the island), and larger islands need more bridges (the number in the island). Then remember that this is all one kingdom, yours, so you must make it possible for all the citizens to travel between all the islands.
One unit comes with 30 puzzles with 60 pieces of paper (Two sheets of paper per puzzle so that you can enjoy it twice!).